HIGHLIGHTED_CHANGES_TO_SPECIFICATION_SECTIONS_C_&_E_(8-19-19).pdf

HIGHLIGHTED CHANGES TO SPECIFICATION SECTIONS C & E – 8/16/19

SUMMARY – This document was created to highlight the changes made to contract specification sections C & E.

CHANGES:

CHANGE (1)

Section E – “G. GFE ROBOTICS TESTS (LEVEL 3”

Specified 15,000 lb test weights for the overhead gantry crane load tests.

CHANGE (2)

C315 (B)

Clarified: “The deckhouse stanchions shall be 6” SCH 80 as shown on the Deckhouse Construction drawing. The Contractor shall update the weight estimate to show the correct stanchion sizing.”

CHANGE (3)

C305 (B)

Clarified – “The reel alley floor shall be ¼” plate.”

CHANGE (4)

C655 Hydraulic System (J)

Clarified – “For bidding purposes, each HPU shall be equipped with dual redundant motors. HPU #1 shall be powered by two 150 HP redundant motors, and HPU #2 shall be powered by two 300 HP redundant motors. The HPU’s shall utilize AC power.”

C655 - Corrected paragraph letters.

CHANGE (5)

C705 AC Electrical System (B)

Clarified – “Note: The one-line drawing currently shows HPU #’s 1-4, however there are only two HPU’s required (HPU 1 & HPU 2). Each HPU requires two redundant motors in accordance with Section C655 (J). Each motor for each HPU shall be fed power via different 750 VDC buses (forward and aft). As an example – the motors for HPU 1 shall be fed power as follows: HPU Motor “1A” shall be fed power via the aft 750 VDC bus and HPU Motor “1B” shall be fed power via the forward 750 VDC bus.”

CHANGE (6)

C550 Spuds (B)

Added – “The Government recognizes that the Contract Drawing shows the spuds from another Army Corps vessel not related to the Mat Sinking Unit. For bidding purposes (until the final spud design drawing is provided to the contractor), the contractor shall bid on constructing and installing two (2) of the spuds shown on the Contract Drawing.“

CHANGE (7)

C456 (B) – specified what layer the mooring winch is rated at. Specified line speed for barge handling winch.

C554 (C) – specified line speed for spud winch.

CHANGE (8)

C554 (B) SPUD HANDLING SYSTEM

Clarified: “Note: The scope of work does not include construction & installation of the spud hinge/cradle. The hinge/cradle itself will be added to the Contract at a later date by Contract Modification. The hinge/cradle design details will be provided by the Government at that time. “

CHANGE (9)

C430 (C)

Specified steel for the plate flooring.

CHANGE (10)

C705 (B)

Added: “While the one-line & load analysis drawing provided shows the total load for all the traction winches as 200 kW, the Government currently estimates the actual sum of the traction winch loads to be 400 kW. The Contractor shall update the one-line and load analysis and revise the vessel’s electrical system design as necessary to account for this load.

The motor size for each traction winch is estimated to be approximately 75-100 HP.”

CHANGE (11)

C598 (I)

Clarified – “The Contractor shall install the GFE sonar transducer in the transducer well. Assume the transducer well is 10 ft. starboard of centerline, at midship. Note – construction of the transducer well itself is not included in the scope of work and will be included by contract modification at a later date.

The current scope of work shall only include the final installation of the transducer (install transducer device, provide and run cabling, etc.).”

CHANGE (12)

C598 (B)

Added:

“The government has estimated that all GFE components and systems that are required to be installed in C598 (excluding the Traction Winch Systems, Launch Wire Clamping & Cutting Systems, and Robotics Central Control Hub) may require approximately 9,500 man hours to install.

Note - VFD’s for Robotics GFE are to be supplied by the robotics integrator.”

Section E

Added the allotted hours for GFE robotics testing to Section E under section “G. GFE ROBOTICS TESTS

(LEVEL 3)”:

“NOTE: The government estimates that the portion of the Level 3 testing related to GFE robotics systems may take approximately 3000 man hours (to be provided by the Contractor).”

Added the allotted hours for GFE robotics testing to Section E under section “H. FINAL ACCEPTANCE

DEMONSTRATIONS (LEVEL 4)”:

“NOTE: The government estimates that the portion of the Level 4 testing related to the GFE robotics systems may take approximately 9000 man hours (to be provided by the Contractor).”

CHANGE (13)

C706 (B)

Revised paragraph letters

C706 (C)

Added - “The government estimates the motor size for each driven wheel assembly motor to be approximately 2 HP.”

CHANGE (14)

C598 (F)

Clarified that the shafts will come pre-assembled with components on them:

“For bidding purposes assume the following GFE components are delivered to the Contractor as the following loose components:

o Axles with wheels, sprockets and other components already pre-assembled o Axle end supports o Chains o Motor o Motor Mounts (bolted connections)”

CHANGE (15)

C445

Deleted requirement for “International Shore Connection”

CHANGE (16)

C415 (C)

Added clarification: “The Contractor shall develop the necessary details for the hatch hydraulic cylinders in order to provide functional hatch cylinders that are compatible with the hatches.”

CHANGE (17)

C550 (B)

Added: “For bidding purposes, the contractor shall assume the spud handling system configuration is similar to that shown in the below image. Note that the scope of work includes only the final installation of the spud (Reeve spud winch wire rope through deck sheave, through the spud sheave, and dead-end at a pad-eye on deck) as shown in the image below. For bidding purposes, the Contractor shall assume that the Government will provide and install the deck sheave and pad-eye.”

(See Contract Spec section C550 (B) for image of spud handling sheave system configuration)

C554 (C)

Clarified – “Wire rope capacity shall be 325 ft. for each winch. The Contractor is responsible for reeving the wire rope on the winch drums. See Contract section C550 for additional requirements for reeving the spud hoist winch wire through the sheave system.”

Clarified – “Suitable guards shall be provided NEAR THE WINCH around exposed wire rope for personnel safety, and painted yellow.”

Deleted the following requirement: “Keepers shall be provided to prevent the wire rope from jumping off the sheaves due to slackness of the wire.”

Added: “The Government recognizes that the winch performance characteristics may have to be altered at a later point by Contract Modification, once the spud design is finalized. For bidding purposes, the Contractor shall bid on providing the winches called out in this contract specification.”

C554 (D)

Clarified – “Wire rope capacity shall be 135 ft. for each winch. The contractor is responsible for reeving the wire rope on the drums and through the one deck fairlead. For bidding purposes, the Contractor shall assume the deck fairlead is provided and installed by the Government.”

C554 (E)

Added: “For the spud cylinders, the contractor shall assume the hydraulic cylinder configuration shall be similar to that shown on the image included below. This is an image of the cylinder on the existing unit.

For bidding purposes, the Contractor shall provide a rod size (diameter) of 3”. The Government estimates the overall length of the required hydraulic cylinder with the rod fully extended to be approximately 6 to 8’. For bidding purposes, the rod and cylinder shall be stainless steel. The mount type shall be MP1. The Contractor shall further develop the design of the hydraulic cylinder during the engineering phase.”

(See Contract Spec Section C554 (E) for image of hydraulic cylinder)

CHANGE (18)

C398 (B)

Clarified: “Note: The Mat Deck Structural Plan drawing shows (non-driven) rollers at the top of the mat deck (they are greyed out). The Contractor is not required to provide or install these rollers. The Government intends to include these as a contract requirement at a later date by Contract Modification.

Note that these rollers are separate from the GFE driven wheel conveyor assemblies, which are required to be installed by the Contractor (See C598).”

CHANGE (19)

Revised Section E based on revisions to electrical sections in Section C (C700’s) (this included minor changes made to Section E Dock Trial & Demonstration #41).

Section E – Corrected the paragraph letters in Section E as well as minor typos through-out Section E.

CHANGE (20)

Electrical System Major Changes:

C720 (B) Removed the note that said breakers are required for the 750 VDC and 350 VDC buses. The Government is requiring fused disconnects for those buses as the one-line drawing shows.

C733 (B thru F)

Revised the requirements for the diesel generator sets. See contract Spec C733 (B thru F)

C740

Revisions made:

• Added transient paralleling capability

• Added: “Full control and monitoring of the generator sets shall be provided at the power management system cabinet in the EOS” o And also removed “A generator control section for each generator” from switchboard.

• Specified requirements for DC link cabinets as follows:

“Main [750VDC] DC link cabinets shall include the following components and features:

• Manual fused disconnects for generators and 750VDC loads with position indicators

• Voltmeters

• Ammeters

350VDC DC link cabinet shall include the following components and features:

• Manual fused disconnect for 350VDC loads with position indicators

• Voltmeters

• Ammeters”

• Revised requirements for 480 V switchboard. See Contract Spec C740.

• Revised Shore Power Operation Requirements. See Contract Spec C740.

• Revised Isolation Ground Bus & Ground Detection requirements. See Contract Spec C740.

• Revised breaker and fused disconnect requirements. See Contract Spec C740.

C745 (C)

Clarified: “All panelboards shall be equipped with dedicated disconnect switches adjacent to the panelboards. The use of branch circuits for main breaker feeders into panelboards is not acceptable.”

C750 (D)

Clarified: “AC distribution main feeder circuit breakers and panelboard breakers for motors and motor controllers shall be sized and installed in accordance with the ABS requirements and the following…”

C755 (B)

Clarified: “The Contractor shall provide and install four sets of transformers, DC to AC converters, and filters to connect the 750 volt DC, 2-wire system to the 480 volt AC, 3-phase, 3-wire, 60-Hz system and to the 240 volt AC, 3-phase, 3-wire, 60-Hz system as shown on the One-line diagram contract drawing.

The Contractor shall provide two additional sets of transformers to connect the 480 volt AC, 3-phase, 3-wire, 60-Hz system to the 120 volt AC, 3-phase, 3-wire, 60-Hz system.”

C780 (J)

Added: “Full control and monitoring of the generator sets shall be provided at the power management system cabinet in the EOS.”

CHANGE (21)

C518 (B)

Clarified – “The Contractor shall provide and install a complete jetting system.”

Revised – “37 nozzles per row of nozzles shall be provided and installed”

CHANGE (22)

C598 (E)

Added – “Note: The barge will incorporate a regenerative electrical system to backfeed power from some of the GFE robotic loads to the main buses. The design of the regenerative system is not yet complete. For the purposes of bidding, the Contractor is required to provide three (3)50kW resistor banks as a part of the regenerative system.”

CHANGE (23)

C601 (E)

Removed mention of “potable water system” and “sewage system” from paragraph E since there is no potable water system or sewage system required.

CHANGE (24)

C775

Added – “The Contractor shall minimize the interference between the transducer signals as much as possible. The transducers shall be independently controlled such that they can be turned on/off individually to avoid potential interference issues.”

CHANGE (25)

C660 (C)

Clarified – “Note that the Machinery Arrangement drawing only shows one ballast manifold and this is an error in the Machinery Arrangement drawing. The Contractor is responsible for meeting the written requirements of this section (C660) and providing a ballast system in accordance with the Contract Drawings of this section. The Contractor shall update the Machinery Arrangement drawing to show the correct number and location of ballast manifolds.“